<template>
  <div class="bottom-bar">
    <transition name="slide-up">
      <div class="bottom-wrapper" :class="{ 'hide-box-shadow': ifSettingShow || !ifSettingShow }"
        v-show="ifTitleAndMenuShow">
        <div class="icon-wrapper">
          <span class="icon-list-ul icon" @click="showSetting(3)"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-resize-h icon" @click="showSetting(2)"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-sun icon" @click="showSetting(1)"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-a icon" @click="showSetting(0)">A</span>
        </div>
      </div>
    </transition>
    <transition name="slide-up">
      <div class="setting-wrapper" v-show="ifSettingShow">
        <div class="setting-font-size" v-if="showTag === 0">
          <div class="preview-left" :style="{ fontSize: fontSizeList[0].fontSize + 'px' }">A</div>
          <div class="select">
            <div class="select-wrapper" v-for="(item, index) in fontSizeList" :key="index"
              @click="setFontSize(item.fontSize)">
              <div class="line"></div>
              <div class="point-wrapper">
                <div class="point" v-show="defaultFontSize === item.fontSize">
                  <div class="small-point"></div>
                </div>
              </div>
              <div class="line"></div>
            </div>
          </div>
          <div class="preview-right" :style="{ fontSize: fontSizeList[fontSizeList.length - 1].fontSize + 'px' }">A</div>
        </div>
        <div class="setting-theme" v-else-if="showTag === 1">
          <div class="setting-theme-item" v-for="(item, index) in themeList" :key="index" @click="setTheme(index)">
            <div class="preview" :style="{ background: item.style.body.background }" :class="{ 'no-border': item.style.body.background === '#fff' }"></div>
            <div class="text" :class="{ 'selected': index === defaultTheme }">{{ item.name }}</div>
          </div>
        </div>
        <div class="setting-progress" v-else-if="showTag === 2">
          <div class="progress-wrapper">
            <input type="range" class="progress" max="100" min="0" step="1"
              @change="onProgressChange($event.target.value)" @input="onProgressInput($event.target.value)"
              :value="progress" :disabled="!bookAvailable" ref="progress">
          </div>
          <div class="text-wrapper">
            <span>{{ bookAvailable ? progress + '%' : '加载中...' }}</span>
          </div>
        </div>
      </div>
    </transition>
    <content-view :ifShowContent="ifShowContent" v-show="ifShowContent" :navigation="navigation"
      :bookAvailable="bookAvailable" @jumpTo="jumpTo">
    </content-view>
    <transition name="fade">
      <div class="content-mask" v-show="ifShowContent" @click="hideContent"></div>
    </transition>
  </div>
</template>

<script>
import ContentView from '@/components/Content'
export default {
  components: {
    ContentView
  },
  data() {
    return {
      ifSettingShow: false,
      showTag: 0,
      progress: 0,
      ifShowContent: false
    }
  },
  props: {
    ifTitleAndMenuShow: {
      type: Boolean,
      default: false
    },
    fontSizeList: Array,
    defaultFontSize: Number,
    themeList: Array,
    defaultTheme: Number,
    bookAvailable: {
      type: Boolean,
      default: false
    },
    navigation: Object
  },
  methods: {
    hideContent() {
      this.ifShowContent = false
    },
    jumpTo(target) {
      this.$emit('jumpTo', target)
    },
    onProgressInput(progress) {
      this.progress = progress
      this.$refs.progress.style.backgroundSize = `${this.progress}% 100%`
    },
    onProgressChange(progress) {
      this.$emit('onProgressChange', progress)
    },
    setTheme(index) {
      this.$emit('setTheme', index)
    },
    showSetting(tag) {
      this.showTag = tag
      if (this.showTag === 3) {
        this.ifSettingShow = false
        this.ifShowContent = true
      } else {
        this.ifSettingShow = true
      }
    },
    hideSetting() {
      this.ifSettingShow = false
    },
    setFontSize(fontSize) {
      this.$emit('setFontSize', fontSize)
    }
  }
}

</script>

<style lang='scss' scoped>
@import '../assets/styles/global';
@import '../assets/mzui/css/mzui.min.css';

.bottom-bar {
  .bottom-wrapper {
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 101;
    display: flex;
    width: 100%;
    height: px2rem(40);
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0, 0, 0, .15);

    &.hide-box-shadow {
      box-shadow: none;
    }

    .icon-wrapper {
      flex: 1;
      @include center;

      .icon-list-ul {
        font-size: px2rem(15);
      }

      .icon-resize-h {
        font-size: px2rem(16);
      }

      .icon-sun {
        font-size: px2rem(16);
      }

      .icon-a {
        font-size: px2rem(17);
      }
    }
  }

  .setting-wrapper {
    position: absolute;
    bottom: px2rem(40);
    left: 0;
    width: 100%;
    z-index: 101;
    height: px2rem(50);
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0, 0, 0, 0.15);

    .setting-font-size {
      display: flex;
      height: 100%;

      .preview-left {
        display: flex;
        flex: 0 0 px2rem(40);
        align-items: center;
        justify-content: flex-end;
      }

      .preview-right {
        display: flex;
        flex: 0 0 px2rem(40);
        align-items: center;
        justify-content: flex-start;
      }

      .select {
        display: flex;
        flex: 1;

        .select-wrapper {
          flex: 1;
          display: flex;
          align-items: center;

          &:first-child {
            .line {
              &:first-child {
                border-top: none;
              }
            }
          }

          &:last-child {
            .line {
              &:last-child {
                border-top: none;
              }
            }
          }

          .line {
            flex: 1;
            height: 0;
            border-top: px2rem(1) solid #ccc;
          }

          .point-wrapper {
            position: relative;
            flex: 0 0 0;
            width: 0;
            height: px2rem(7);
            border-left: px2rem(1) solid #ccc;

            .point {
              position: absolute;
              top: px2rem(-8);
              left: px2rem(-8);
              width: px2rem(20);
              height: px2rem(20);
              border-radius: 50%;
              background: white;
              border: px2rem(1) solid #ccc;
              box-shadow: 0 px2rem(4) px2rem(4) rgba(0, 0, 0, .15);
              @include center;

              .small-point {
                width: px2rem(5);
                height: px2rem(5);
                background: black;
                border-radius: 50%;
              }
            }
          }
        }
      }
    }

    .setting-theme {
      height: 100%;
      display: flex;

      .setting-theme-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: px2rem(5);
        box-sizing: border-box;

        .preview {
          flex: 1;

          &.no-border {
            border: px2rem(1) solid #ccc;
            box-sizing: border-box;
          }
        }

        .text {
          flex: 0 0 px2rem(20);
          font-size: px2rem(14);
          color: #ccc;
          @include center;

          &.selected {
            color: #333;
          }
        }
      }
    }

    .setting-progress {
      position: relative;
      width: 100%;
      height: 100%;

      .progress-wrapper {
        width: 100%;
        height: 100%;
        @include center;
        padding: 0 px2rem(30);
        box-sizing: border-box;

        .progress {
          width: 100%;
          -webkit-appearance: none;
          height: px2rem(2);
          background: -webkit-linear-gradient(#999, #999) no-repeat, #ddd;
          background-size: 0 100%;

          &:focus {
            outline: none;
          }

          &::-webkit-slider-thumb {
            -webkit-appearance: none;
            /*清除系统默认样式*/
            height: px2rem(20);
            width: px2rem(20);
            border-radius: 50%;
            border-radius: white;
            box-shadow: 0 4px 4px 0 rgba(0, 0, 0, .15);
            border: px2rem(1) solid #ddd;
          }
        }
      }

      .text-wrapper {
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        color: #333;
        font-size: px2rem(12);
        text-align: center;
      }
    }
  }

  .content-mask {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 101;
    display: flex;
    width: 100%;
    height: 100%;
    background: rgba(51, 51, 51, .8);
  }
}</style>
